Warp stop-motion for looms.



No. 879,878. PATENTED FEB. 25, 1908.

H. HOBSPAL. WARP STOP MOTION FDR LOOMS.

APPLIOA'HOI FILED 10. 1900.

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JM ATTORNEY w 7 I NTED FEB. 25. 1908. Ho 879,8 3 H. HORSFAL. PATH WARP STOP MOTION FOR LOOMS Arruonlol rum) 09.10. 1m. 8 Humbug i PATENTED FEB. 26, 1908. N0 -879,873 H HORSFAL WARP STOP MOTION FOR LOOMS.

APPLIOA'HOI FILED AUG. 10, 1908. 3 BHEETB-BHBBT 3' INVENTOR JM ATTORNEY).

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UNITED STATES PATENT OFFTCE.

HERBERT IIORSFAL, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO 'II-IIC SALTS 'IICXTILF. MANUFACTURING COMPANY, OF BRIDGICIORT, CONNECTICUT, A CORPORATION OF CON- WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented Feb. 26, 19023.

Applloatlnu filed August 10. 1906. Serial No. 330007.

To all whom it may concern:

Be it known that l, Ilsnssa'r IIURSFAL, a citizen of the United States, residing at Bridgeport. in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Warp Stop- .\lotions for Looms, of which the following is a specification.

The present invention relates to warp stop motions for looms in which the warp threads support a series of metallic drop devices during the normal running of the loom, said drop being adapted, when a warp thread breaks or becomes unduly slack, to either close a controlling circuit or to set mechanical means for putting in operation the knock-off mechanism.

The object of the invention is to provide means in that type of stop motion to intermittently raise the drops from the warp threads to permit the latter to momentarily was free of the drops for the purpose fully set forth in the following s )ecification.

The invention is atapted to pile fabric looms as well as to ordinary looms and in the drawings I have illustrated it as applied to both an electrical and a mechanical warp stop motion.

In the accompanying drawings Figure l is a side view partlv diagrammatic of a pile fabric loom embodving the invention; Fig. 2 a plan view of the loom stopping mechanism shown at the ri ht in Fig. l igs. 3 and 4 are enlarged detai views of the loom stopping mechanism: Fig. l) a side view and Fig. (l a plan view of the easing bars or rods for the die warps; Fig. 7 a detail view of an easing air or rod for the pile war is with a dro dc- \ice in normal position; -ig. H a [INN ified means for intermittently raising the pile warp drops; Fig. U a view partly in elevation and partly in section to illustrate the a )plication of the invention to a mechanica warp stop motion; and Fig. It) a vertical section on the plane of the line Ill -1U of Fi 9.

Similar reference numerals indicate similar parts in the several views.

I will first describe the general parts of the loom and the knock-off or stop )ing mechanism which may be of any well known construetion.

Referring to the drawin 's the numeral 1 designates the main warp want; '2 the main or back warps; 3 the pile warp beam; 4 the pile warps; 5 the let-off rolls for the pile warps; and 6 the whip roll. The warps are led through the usual harness mechanism indicated at 7 for the formation of the sheds, the pile. warps being carried u through the back warps to casim rods and let off intermittentlv to float between the two back warps o the fabric in the usual and well known manner. The pile warps carry metallic drops 8 and the back warps similar drops 8, these drops being adapted when a warp breaks, and )y this is meant to include not only an actual severance of the warp but any abnormal slackness thereof, to close a controlling circuit 9 for the loom stop )ing mechanism. This mechanism may be of any known type and for the purpose of illustration I have selected one which comprises an auxiliary knock-off lever 10 which rests upon the main knock-off lever If, both of said levers bein Y pivoted on a bracket 12 extending from tiie breast beam 12. Secured to lever I0 is a bracket 13 which carries an electro magnet 14 included in circuit 9. The armature 15 of said magnet projects toward the lay 16 on which is fixed a tappet 17. The magnet 14 is normmally del'mergized so that its armature is out of the path of ta )pct 17 on the beat up of the lay, but when a back or )ile warp breaks the controlling circuit 9 is c osed thereby energizing said nnwnet and positioning its armature in the path of said ta pet on the next beat up of the lay.

ien tappet I7 impin es against armature l5 auxiliary lever ll) wi I be shifted and thus act on shipper lever 18 to release it. from its retaining shoulder If) to stop the loom. The main knock-off lever II is connected at its free end to the slide 20 which carries the weft fork 2f, the latter cot'iperating with the weft hammer (not shown) in the usual numner to release the. shipper lever upon the exhaustion or failure of the filling. A let-oil lever 22 fixed on a rock shaft 23 is adapted, when im )inged upon by the knock-oil lever H, to ift the back pawl of the take-up ratchet. This construction is well known and requires no further descri )tion.

To effect the c osing of circuit 9 to energize magnet 14 for the purpose above stated I may em )loy metallic dro devices s, s, of l any well known type. 'lhe form shown is provided with a closed slot .24 in the. upper art thereof, and an o )en ended slot in the ower part thereof, t w latter servun as a thread aperture, as clearly indicated in Fig.

il l) IOU 7. Referring more particularly to Figs. 1, 5, 6 and 7, the pile warps 4 ass over and are supported by two paralle easing rods .26 fixed at their ends in plates .27, one only of said plates being shown. Plates .27 have mounted in them a coin )ound terminal corriprising a bar is and a blade .29 set into the upper edge thereof, said bar and blade being insulated from each other and connected to the respective terminals of circuit fl. The bar 28 is insulated from the supporting plates 27 as indicated in Fig. 5. This form of terminal is well known. As shown in Fig. l the drop devices h are supported on the short lengths of the pile warps 4 which latter extend across and bridge the space between the casing rods 26. In the present embodiment of the invention the com round terminals extend through the closed slots 24 of the drois 8 above the point of suspension of said drops on the pile warps. Plates 2? which support the casing rods are connected by wires 30, in which are springs 31 to serve as a cushion or easement, to the usual mechanism ada )ted to take up the slack warp. The end plates are aided in their up and down movements in :ilots in brackets 3'2 fixed to the. loom frame.

The drop devices h" on the back war )8 2 are similar to those above described. 'l were warps pass over and are supported on a fixed plate 32 (Fig. l) which is slotted to serve as a guide for the drops. The compound terminal is also similar to that above described except that it is secured to a fixed late in the usual manner and not to a movalile plate as with the terminals which cooperate with the pile warp drops.

The o )eration of the mechanism so far described will be readily understood. During the normal running of the loom the drop devices will be an )ported on the warps out of contact with tlie blade 29 of the comound terminal. When, however. either a mck or a pile warp breaks the corresponding dro) will be released and falling upon the blade 2t) of said terminal will close circuit 9, it being ulidemtood that the drop devices are always in contact with bar '21s of said terminal. The magnet. l4 being thus energized the knock-off mechanism will be set in operation to stop the loom.

The application of circuit closing drop devices to a pile fabric loom has been successfully made in substantially the nnumcr above described. It has been found in practice. however, that when using a pile warp of soft, fluffy material an a )preciahle quantity of lint is thrown off which collects in balls in front of the drops and is ultimately carried into the fabric. The cleaning of the dro is at stated intervals to prevent this is apt to lie neglected by o )cratives, and furthermore the close assem blage of the drops renders such clearing unhandy and troublesome to accomplish, besides resulting in loss of time due to the necessary stopping of the loom. In order to prevent the accumulation of an undesirable quantity of lint and thus obviate the presence of bunches in the fabric, and to do away with the necessity of cleaning the drops, I have provided means for automatically raising the drops from the warps at frequent intervals during the normal running of the looln. With regard to the pile warps this may be accomplished by placing a stationary plate below and across the path of the rising and falling drops, or by causing a movable plate to be pro ected across the path of the drops. l will first describe the application of the invention to the pile warp dro is.

lleferring to Fig. l the numeral 33 designates a stop plate fixed to the loom frame below each series of pile warp drops so that as the casing rods 26 are lowered the drops will rest upon the corresmnding plate 325 aml remain thereon whi e the said rods continue their downward movement. This causes the drops to be raised from the supporting pile warps a sullicient distance to )ermit any lint which may have become lmnked up against the side of a dro to pass on throu 'h the slot 25, and as the drops are continually raised and lowered such temporary release of the drops from the warps will either prevent the iu'cumulation of any lint at all, or only such an insignificant amount as not to be noticeable in the fabric. (are should be observed in placing the plates 33 and in providing a slot 24 in the drop of sullicient len'th as to permit of the desired movement oi the drop to free it from the war without causing the drop to en age the l)lll( 0 29 of the compound terminali That is, the distance between the lower side of the bar 28 of said terminal and the lower end wall of slot .24 of the drop should be such as to permit the drop to rise a sullicicnt dis tance to clear its an )porting warp thread; and on the other hand. when the casing rods are raised the warp thread should engage the end wall of slot .25 of the corresponding drop before opportunity is given the blade '2!) to euga e t 1e up er end wall of slot l which won d effect t ie knocking off of the loom.

'lhe drops of the left hand series in Fig. l are shown in contact with their plate Slit to )ermit the escape of lint if any has accumuated, while the drops of the right hand series are shown in their uppermost position and supported on the corresponding pile war is. Should a pile warp happen to break whi e the corres mmlin drop is on its plate 33, circuit fl wil be ehised when the compound terminal in its upward movement picks up the fallen drop.

In some types of pile fabric looms i1 is diflieult, if not impossible owing to lack of like Ill)

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space, to provide two supporting easing rods for each set of pile warps to enable the )roper disposition of the drop devices as indicated in ig. 1. When it is not feasible to follow that plan I may employ the arrangement shown in Fig. s in which the pile warps 4 are carried in a horizontal plane over a fixed plate 34 inter )USttl between the beam 3 and the let-off rol s the casing rods being indicated at 26'. The plate 34 is similar to that heretofore described exce )ithat instead of being mounted on a movab e member it is fixed to the loom frame. For the purpose of lifting the pile war) drops in the arrangement illustrated in Fig. h I provide cams 36 mounted on a suitable shaft at opposite sides of the loom. only one of said cams being shown. Engaging said cams are followers 37 carried by levers 38 which. through links &9, are connected to pivoted plates 40 extending across the loom and which are adapted to be moved against the drops to raise the latter from their supporting war) threads when followers 37 ride over the big t points of the cams. (ams 30 may be so timed as to raise thedrops at an vstated interval to carry out the intended purpose of the invention.

The invention is equally well adapted to the dro )S on the back warp threads in a pile fabric foom. or to the war) threads of an ordinary loom. especially w ien using single end warps or an v yarn which is weak and throws an appreclablet uantity of lint resulting from the chafing o the yarn against the drops. Such application is shown in Fig. l in which the back warp drops s are suspended over horizontal plates 41 carried by rods 4'2 on opposite sides of the loom, only one of said rods being shown. The rods 42 are connected at their lower ends to levers 43 pivoted at 44 and carrving followers 45 which engage cams 4h. The latter are rotated through gears 47. or other suitable means. .\s here shown. when followers 45 ride over the low points of cams 4t) lever 43 will be rocked to move the plates -il upward the proper distance to contact with drops h" aml to therebv raise them from the supporting warps. The normal position of plates 41 is indicated in Fig. l, the cams to being cut so as to move said plates at snllicient distance for the desired purpose. Brackets 43 are provided to guide the rods 4'. in their movements, and springs 4t) to hold followers 45 in en 'agement with the cam faces.

The same precautions should be observed as to the extent of the lifting movement of the drops and the length of slots .24 of the drops in the adaptation of the invention to the back warps,or that illustrated in Fig. s on the pile warps, as heretofore described in connection with the pile warp dropsof Fig. l.

The present invention is equally well adapted to a mechanical warp stop motion and for the purpose of illustration 1 have taken the stop motion described in United States Patents No. mono-2 and No. 796.693, dated August 8, i905, aml granted to W. ll. linker. Referring to said patents and to Fig. ii of the present drawings the shaft 5t) has mounted thereon an eccentric 5| to which is secured a rod 5. which actuates a bell crank lever 53.'' 'lhe upper arm of said lever is provided with one or more sets of resilient spring forks 54 adapted to engage a pin 55 projecting from the side of a notched bar 5!). This bar is slidablv mounted in a stationary support 57. said support being also notched or serrated. The pin 55 extends through a slot in the side wall of the support 57. 'lhe drop devices 5h may be of the form illustrated in Fig. Hi to embrace the support 57 so that during the normal running of the loom bar 5t) will be reeiprocatcd b v reason of the engagement of pin 55 with the spring forks 54. .\s fully ex )ltllllttl in the patents above noted. when a drop falls by reason of the breakage or undue slackncss of its warp thread the movement of bar so will be arrested thereby permitting a fccler carried by a lever 59 to either impinge against the side of a bar so or to pass through an opening therein to set in operation the stopping mechanism.

The application of the presentv invention is elfeeted bv mounting eccentrics tit), one of which is shown and to which are connected rods til, said rods being attached to and supiortin r a plate 62 wluch extends across the loom )elow the drop devices. As shaft 5t) revolves the plate til. will be raised so as to contact with the drop devices and momentarily liftthem from their so )porting warp threads for the mrpose fu l v before described. it is to iaunderstood that reference to the above patents is merel for the sake of illustration as the invention may be applied to other forms of mechanical warp stop motions. it is also to be understood that while the invention is illustrated as applied to the warp of a loom it is equally well atla nod to warp stop mechanisms of an kim .such as war iing machines, warp balling machines, warp lieaming machines and the like.

What I claim and desire to secure by Letters latcnt is:---

1. In a warp stop motion for looms the combination o stopping mechanism, drop devices supported on unbroken warp threads and adapted to set in operation the stopping mechanism when a warp thread breaks. a plate located below said drop devices, and means for iroducing a relative movement between snit l plate ntul drop devices for intermittently raisin the latter from the supporting warp threads during the normal running of the looln.

.3. in a warp stop motion for looms the combination of stopping mechanism a controlling circuit for said mechanism, t rop devices supported on unbroken warp threads adapted to close said circuit when a warp thread breaks, a plate located below said;

drop devices, and means for )roducing a relative movement lietween said plate and dro )R for intermittently raising the latter from t to supportin warp threads during the normal runningo the loom.

3. In a war stop motion for a pile fabric loom the combination of stopping mechanism, a controlling circuit for said mechanism, means for supporting the pile warps during a portion of their travel in a substantially horizontal plane, drop devices supported on the unbroken pile warps at such pomt said drops being ada ted to close said circuit when a pile warp reaks, a )late located below said drops, aml means or )roducing a relative movement between said plate and the dro s for intermittently raising the latter from tiie sup'portin I warp threads during the normal runningo the loom.

4. In a war stop motion for a pile fabric loom the com ination of stopping mechanism, a controlling circuit for said mechanism, easing rods over which the pile warps pass, drop devices supported on unbroken warps between the casing rods said drops being adapted to close said circuit when a lpile warp breaks, and stationar plates extent ing transversely of the loom below and in the path of travel of said dro )s for intermittently raising the latter from t he supporting warp threads during the normal running of the loom.

5. In a war stop motion for a pile fabric loom the combination of stopping mechanism, a controlling circuit for said mechanism, means for supiorting the pile warps at a point between t to beam and the easing rods in a substantially horizontal plane, drop devices sup orted on unbroken warps at said point salt drops being adapted to close said circuitwhen a pile warp breaks, a )late extending transversely of the loom be ow said drops, and means for intermittently moving said plate against the drops for raising the latter rom the supporting warp threads during the r normal running of the loom.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HERBERT llORSl Ali.

Witnesses:

ALI-RED I'IULRUYD, Aa'riwa OAKLEY. 

